39780925 has 6 divisors (see below), whose sum is σ = 49328378. Its totient is φ = 31824720.

The previous prime is 39780919. The next prime is 39780931. The reversal of 39780925 is 52908793.

It is a happy number.

39780925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39780919) and next prime (39780931).

It can be written as a sum of positive squares in 3 ways, for example, as 2595321 + 37185604 = 1611^2 + 6098^2 .

It is not a de Polignac number, because 39780925 - 2⁵ = 39780893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 795594 + ... + 795643.

Almost surely, 2^39780925 is an apocalyptic number.

It is an amenable number.

39780925 is a deficient number, since it is larger than the sum of its proper divisors (9547453).

39780925 is a wasteful number, since it uses less digits than its factorization.

39780925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591247 (or 1591242 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 39780925 is about 6307.2121416677. The cubic root of 39780925 is about 341.3696910489.

The spelling of 39780925 in words is "thirty-nine million, seven hundred eighty thousand, nine hundred twenty-five".